Tool-holding device



Nov. 2 192e. 1,605,858

D. SHONQUIST TOOL HOLDING DEVICE Filed ont.' e, 192s Patented Nov. 2, v19263.

DANIEL sHoNQUIsT, or Tampico, Mexico.v

TooLLHoLnIne nnvrcii. i

Y Application flied .october 6,1923;

This invention relates to improvements in tool holding devices and particularly to devices for holding drilling tools. such as used in drilling oil wells and the like.

45 In the operation of drilling through the earths surface tor oil it is usually necessary to drill a considerableY distance into the earth and it is desirable to minimize the wear on the wire rope or other operative connection between the drilling tool at the bottom ot the well and the source of power located on the surface of the ground to keep sand or other deleterious material from entering the tool joint threads and injuring the same. y

@ne ot the objects of the present invention is to provide an improved toolholding device in which the wire rope is protected from excessive w-ear and thus increase its life.

Another object relates to minimizing the play between the several parts of the device whereby distortion of certain of the parts is elfectively prevented.

Another object relates to the provision of a tool socket which may be made either i stift or swivelling, as may be desired.

Another' object relates to the provision o ot ball bearings for insuring rotation of u the drilling tool after each operation.

Qtli-er objects will appear Jfrom the following description taken in connection with the accompanying drawings7 in which- Figure l is a longitudinal section of the assembled tool holding device attached to the lower end of an oil well wire rope;

Figure 2 shows a side elevation thereof; Figure 3 shows a section taken on the line 3-3 ot Figure l; Y V

Figure l showsa section taken on the line 4-4 of Figure l, and Y Figure 5 shows a partial longitudinal*section of the device when held stiff.

Referring to the drawings there is shown a wire rope 1() which is intended to extend through a shaft of the well and is connected at the surface of the ground to a source of power (not shown). The lower end of the rope extends into the interior of a` socket casing or shell 11- having portions 12. 13 ot restricted diameter and portions 14C. 16 of relatively enlarged diameter. The interior of the socket 11 is recessed to form afshoulder 17 near the upper portion thereo For gripping the rope there is provided s bek securely held therein for `the' serial No, 667,004. j

an elongated mandrel or piston 2O having an aperture extending lengthwise therethrough. 'lliewire rope l0 extends through an aperture which is of such configuration as to provide a snug fit of therope therein. In the lower portion of the mandrel 2O the aperture is gradually enlarged .to form a tapered recess 21 and is provided with a series of shoulders, such as 22, 22. The strands of the rope 10 vare thus permitted to unravel somewhat in the enlarged portion 21 of the aperture and to engage the shoulders 22, 22. The Aupper portion of the mandrel 2O has an integral sleeve 23 extendmg upwardly around the rope l0 and within the socket 11,1v forming with the main portion of the mandrel-2O a shoulder 24.

For permitting relative movement Abetween the mandrel 2O and the socket 11 there vmay be provided a ball bearing com` prising a recessed race member 30 and a cone race member 31 co-operating therewith and retained in position by the shoulder 17 of the socket 11 and shoulder '211v of the mandrel 20 respectively.

The wall of the enlarged portion 14 of the socket 11 is provided with a plurality of sand release holes, mitting the escape of earth, sand and slime and insuring a clear-er tool socket. An `adjust-ing lock plug 34 is screw lthreaded into the interior of the socket ll, the lower end thereof being provided with a rectangular recess 35 with which a usual plug wrench may engage. 11 is tapered to` form a tool joint 36 and is provided with whereby the tool. such as a drilling bit, may drilling operation. j

The tool holding device of Figure 1 may be assembled bv inserting the race member 30 into the interior of the socket 1l so as to engage the shoulder 17,` then inserting` the race member 31 so as to engage the iirst named race member and then running the wire rope through the aperture extending through the upper portion of the socket 11 and the two race members. The end ot the wire rope 10 is then inserted into the interior of the mandrel 2() and the strands untwisted so as to engage the shouldersl 22, 22. The mandrel 20 is then drawn back into the socket 11 and into the position shown in Figure 1. The lock plug 34 is secured into the socket l1 by means of a suitable plug such as 33 for per-- The lower end of the socket` usual tool joint screw threads thus tree toirotate with 1l in the operation of longitudinal movement of the parts is positively limited by the ad-v justment oi' the lock plug 34. Such limitation of longitudinal movement eiectively prevents blunting of the mandrel and the Vdistortion ot the mandrel which results Jfrom excessive play between the parts of the device. `lt will alsobe seen that there is provided f because of the .tree motion ot the bearing swivelling or stiftn as` may surfaces, a positive means for eliminating such earth. sand or 'slime as may fall down through the well, these :foreign materials being ejected through the sand release holes 35. Excessive wearot the bearing surfaces due to such foreign materials is thus eiiectively prevented.

Referring to Figure 5 whichshows a modili'cation oa portion oFigure l, there is provided in the space ybetween the upper tace ot the lock pluga and the lower end of the mandrel 20 a 'amb plug 50 whereby rotation ot the jamb plug 'during assembly thereof exerts an upward, pressure on the mandrel sufficient to prevent relative turnine' of the parts. `By screwing the lock plug Bil in tightlya stiii socket is provided.

rlhus it will be seeny that l have provided a tool holding device which may be rendered be desired. The ot the mandrel through to the top end of the socket` is of great importance as Vit minimizes wear on the wire rope and greatly increases the lite thereof.-

urthermore, the arrangement of the parts` is such that there` is substantially no projection play between the mandrel and the socket so that distortion otthe mandrel which would lead to jamming thereor" within the socket is effectively prevented. The number of sand releasing` holes in the socket of the present invention is greatly increased relative to the sockets of the prior` art without materially weakening they socket, thus insuring aclearer vtool socket. l

Various changes or modilications may be employed without departing from the spirit of the invention.- It is understood therefore that the scope ot thelinvention is not to be limited to the particular embodimenty here tools adapted to drill into Lacasse selected for the purpose ot illustration, reference being had to the appended claims for that purpose.

Having thus described my invention, what l claim and desire' to secure by Letters Patent is l. The combination with a mandrel for the earths sur tace, said Vmandrel having a stepped bore extending longitudinally therethrough provided with interiorly disposed shoulders tor engaging a rope, ot a socket arranged to enclose the` mandrel and having tree rotatable movement with respect thereto, and positive means for limiting the longitudinal movement of the socket with respect to the mandrel.v 2. 'A rope socket swivel for well drilling apparatus, comprising in combination a casing having a cylindrical chamber at one end and areduced bore at the other forming a shoulder, the wall ot said casing having a plurality oi pertoration's to permit discharge ot foreign materials from within said chamber, a rotary piston comprising a head and -a stem positioned in thel Chamber and bore respectively and having a. stepped bore extending longitudinally therethrough .for engaging a rope, a separable conical friction reducing bearing between the head ot the piston and the shoulder of the casing, and meansmovable `independently of the piston for effectively preventing relative movement between` the casing and the piston.

3. ln a-swivel for tools adapted to drill into 'the 1 earths surface, the vCombination with a shell Vhaving `a cylindrical chamberl at one end anda reducedboreat the other end torming a shoulder, Vthe wall of said shell having aplurality otperforations to permit egress of foreign materials tromwithin said chamber, of a rotatablemember having'r a head anda stem positioned within said chamber and bore respectively, said member havinga stepped bore. extending l, longitudinally. therethrough .for engaga two part rictionreuucing the head of the rotatable of the shell.

bearing between member and the shoulder,

Signedat Frontera, Tabasco, 4Mexico, this l2 day or" September, A. 13.1923. Y

i DANIEL SHONQUST. 

